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Finding the Fourth Proportional to 572,687.46, 790,313.49 and 318,042.90

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Solution

The fourth proportional to 572,687.46, 790,313.49 and 318,042.90 is: 438,901.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,687.46 : 790,313.49 = 318,042.90 : x
  2. Step 2: Convert to fraction form
    572,687.46/790,313.49 = 318,042.90/x
  3. Step 3: Cross multiply
    572,687.46x = 790,313.49 × 318,042.90
  4. Step 4: Simplify right side
    572,687.46x = 251,353,594,268.72
  5. Step 5: Solve for x
    x = 251,353,594,268.72/572,687.46
  6. Step 6: Final answer
    x = 438,901.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.